My reasoning is fairly straight forward… If you struggle to pull your own weight or if you have compromised shoulder mobility, then you shouldn’t be falling from a pull up bar, swinging through past what your range of motion can handle, bouncing off connective tissue with multiples of bodyweight [you’d be surprised at what velocity can add] and then trying to fling your chin back over the bar... It just isn’t smart…

So to make this a more comprehensive guideline for gymnastics training, then, all we have to do is generalise, then fill in the blanks…